Stainless-Steel Roofing Materials
Steel is one of the most popular types of metal roofing for its high strength and relatively low price. Compared to traditional roofing materials, steel offers a much longer lifespan, better environmental sustainability, better strength and a lower long-term cost. Steel can usually withstand winds of 110-150 mph and can provide excellent leak-free service for 50 years or more.
Most steel roofing materials are made from galvanized steel, although stainless steel is also popular in some parts of the United States. Stainless steel has a very unusual and distinct look, however, and galvanized steel is generally preferable for residential use.
The major disadvantage of steel is that it can rust, so manufacturers typically cover their steel roofing products with a zinc or zinc-aluminum anti-corrosive coating. This coating lasts for about 20 years on average, at which point it needs to be reapplied. Steel roofing materials typically have a rating that indicates the amount of the zinc coating used in each square foot of metal. For example, G-90 galvanized steel has 0.90 ounces of coating per square foot.
As with other types of roofing, steel roofs come in many different colors and designs, including stone-coated steel and painted steel. Kynar paint offers additional protection against corrosion and oxidation.
If steel roofing materials are properly coated, they are a durable, strong choice for residential or business use. Steel roofing companies often remove an existing roof to install a steel roof, but steel roofing can be installed over existing roofing in some circumstances.
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